Kernel Crash Risk in Linux Package Due to ALSA Jack Detection Error Handling
Summary
DEBIAN-CVE-2026-53291: In the Linux kernel, the following vulnerability has been resolved: ALSA: hda/conexant: Fix missing error check for jack detection In cx_probe(), the return value of snd_hda_jack_detect_enable_callback() is ignored. Affects linux versions 6.1.106-1 – 7.1~rc7-1~exp1. No fix is published. How to fix ↓
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Background
The Linux kernel is a core component of the operating system that manages hardware and system resources. It provides essential services for all other parts of the system, including device drivers, system calls, and process management. The ALSA (Advanced Linux Sound Architecture) subsystem is responsible for sound card drivers and audio processing. This vulnerability affects the ALSA subsystem, specifically the hda/conexant driver, which is responsible for handling audio jack detection. The issue arises from a missing error check in the jack detection callback registration process, potentially leading to system instability.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the ALSA subsystem related to jack detection. Specifically, in the cx_probe() function, the return value of snd_hda_jack_detect_enable_callback() is not checked. If this function fails, it returns an error pointer that must be validated using the IS_ERR() macro. Failure to check this return value means that the driver may continue to probe even if the jack detection callback registration fails, leading to potential kernel crashes when the driver attempts to handle jack events or accesses uninitialized structures. This vulnerability can result in system crashes and instability, particularly when audio devices are in use.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the available patches as soon as they are released.
Conclusion
In summary, a vulnerability in the Linux kernel's ALSA subsystem can lead to kernel crashes due to improper error handling in jack detection. It is crucial for users to update their systems to the latest patched versions to mitigate this risk. Regular monitoring of vulnerabilities using tools like Vulert can help maintain system security.
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FAQ
The vulnerability can lead to kernel crashes and system instability, particularly when handling audio jack events.
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The vulnerability affects the Linux packages in Debian 12, 13, and 14, specifically before the patched versions 6.12.94-1 for Trixie and 7.0.10-1 for Forky.
The most effective prevention is to update to the patched versions of the Linux package as soon as they are available.
While there are no specific workarounds, it is advisable to limit the use of audio devices until the system can be updated.
References
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